Lowen



(No Model.)

B. VON BLTZINGSLWEN, M. LEVY 81; F. S. KLOTZ.

- POCKET KNIFE.

No. 486,888. Patented Sept. 23, 1890.

j f@ y, @g y' 5/ /P H] lef/ A UNITED STATES PATENT OFFICE.

BRUNO VON BLTZINGsLwEN, MAX LEVY, AND FELIX s. KLOTZ, OE NEW YORK, N. Y. i

POC KET-KNIFE.

SPECIFICATION forming part of Letters Patent No. 436,888, dated September 23, 189.0.

Application filed July 14, 1890. Serial No. 358,709. (No model.) v

To all whom it may concern:

Beit known thatwe, BRUNO VON BLrZINGs- LWEN, MAX LEVY, and FELIX S. KLOTZ, all citizens of the United States and all residents of New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Clasp- Knives, of which the following is a specification.

The object of the invention is to produce an inexpensive clasp-knife which will be easily opened, easily closed, and easily fastened in either position.

The nature of the invention consists in the details of combination and construction substantially as illustrated in the accompanying drawings, hereinafter described, and subsequently pointed out in the claim.

Figure l is a perspective View of our newlyinvented knife. Fig. 2 is a sectional View of the same with one side plate removed. Fig. 3 is a longitudinal sectional View of the same, taken on a plane at right angles to the side plates. Fig. 4. is a side View of one of the metallic side plates for knives with a single blade. Fig. 5 is a side view of a single-blade knife with a part of the mounting broken away to show the lookin g device B, more fully hereinafter described. Fig. 5 illustrates a metallic side plate as adapted to a knife with two blades. Fig. 6 is a sectional View of a two-blade knife, taken on a plane parallel to the side plates. Fig. 7 is a longitudinal sectional view of the same, taken at right angles to the side plates. Fig. 8 is a sectional View illustrating the arrangement of the middle blade of a three-blade knife.` Fig. 9 is a back view of a two-blade knife. Figs. 10 and ll are detail views illustrating the blade-catch, more fully hereinafter described.V

The handle of this knife consists of a rigid back R, the metallic side pieces M M, and the mounting P P. In a single-blade knife the shank K of the blade K is pivoted to the handle at S. There are two holes or cylindrical recesses, designated by a and ctx, sunk into this shank. At e is a notch adapted to flt upon the end R of the back R when the blade is open. A spring f is fastened to the back R and acts on the blade K by engaging the shank KX. The bladecatch F is a lever pivoted in the handle at g by the lrivet g. One end o of this catch is adapted to engage the recesses a and ax of the blade-shank. The other end 7c is adapted to be pushed by the finger. A spring r, fastened to or integral with the metallic side plate, holds this catch in proper position.

B designates a slide which is movable in the handle by pushing its head BX. The inner end of this slide is adapted and arranged to fit into the mortise h of the blade-catch F,

so that it may be slipped in to lock the bladecatch in position.

To open this knife when it is closed, as illustrated in Figs. l, 2, and 3, the operator with his finger pushes the slide B out from engagement with the blade-catch F. Then he presses upon the end 7i: of the blade-catch. This lifts the end 0 out of engagement with the hole a in the blade-shank. Immediately the spring f throws the blade into open position, and when'the pressure on the head Iltis relaxed the end o of the blade-catch falling into the recess a of the blade-shank by reason of the resilience of the spring r holds the blade open; but while using the knife the pressure of the hand might come upon the head 7c and so release the blade-shank as to render the blade unsteady. To prevent this the inner end of the slideV B may be slipped into the mortise h, and holding the blade-catch irmly lock the blade in position.

To close the knife the slide B is pushed out of its engagement with the blade-catch and the end 7c pressed until the catch releases the blade-shank. Then the blade is closed with the hand until the end 0 0f the catch falls into the recess ax. The inner end of the slide Bis now pushed into the mortise h, and so the knife is securely fastened in closed position.

When the knife is constructed with two blades, these two blades are riveted in opposite ends of the handle, as illustratedin Figs. G and 7. In this case there is a catch for eaeh blade and a locking-slide for each catch, so that they may be manipulated separatelyy at the pleasure of the operator, and each separate blade and its accompanying mechanism is used as hereinbefore described. When the knife is constructed with three or more blades in one end of the handle, the shank of. the inner blade is notched, as designated by b and bx of Fig. 8, and the blade-catch F and the spring r set in the back ofthe handle, as illustrated in Fig. 8, the end o of the catch F engaging the notches b and hx instead of the recesses a and ctx, as before described.

What We claim as our invention, and desire to secure by Letters Patent, is-

The combination, with a knife-handle coinposed of side plates, side mountings, and a rigid back, as hereinbefore speciiied, a blade pivoted in said'handle, notched to accommodate the end of said back and provided with recesses in its shank to accommodate a bladecatch, and a spring fastened in said handle by the finger of the operator and the other end adapted and arranged to engage said recesses in said blade-shank, and constructed with a mortise adapted to be engaged by a locking-slide, a locking-slide movable in said handle and adapted and arranged to engage said mortise in said blade-catch, and a spring fastened in said handle and engaging said blade-catch, all substantially as and for the purpose set forth.

Signed at New York, in the county of New York and State of New York, this 9th day of July, A. D. 1890.

BRUNO VON BLTZINGSLWEN, MAX LEVY. FELIX S. KLOTZA Witnesses:

Jon LOEWENTHAL, HERMANN LEVY. 

